Rocker-arm mounting for internal-combustion engines



.EAGQASG @et 2, i923:

K. R. MANVILLE RocKER ARM MOUNTING FOR INTERNAL coMUsTloN 'ENGINES Filed Deo. 6, 1922 Patented Oct. 2, 1923.

UNITED STATES vPATENT OFFICE.

KEITH R. MANVILLE, OF BROOKLYN, NEW YORK, ASSIGNOR TO INTERNATIONAL MOTOR COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

BOCKER-ARM MOUNTING FOR INTERNAL-COMBUSTION ENGINES.

Application led December 6, 1922. Serial No. 605,315.

To all .whom it may concern Be it known that I, KEITH R. MANVILLE, a citizen of the United States, residing in the borough of Brooklyn, of the city of New York, in the State of New York, have invented certain neuT and useful Improvements in Rocker-Arm Mountings for Internal-Combustion Engines, of which the following is aspecification, reference being had to the accompanying drawing, forming a wart hereof.

his invention relates to an improved mounting for rocker arms for actuating the valves of interna-l combustion engines, such arms being ordinarily used `in connection with over-head valves. A force-feed lubrication is required for such rocker arms and heretofore it has been the prac-tice to mount all of the arms for a given set of valves on a'single tubular shaft through Which oil might be forced to each one of them. The objection to this practice is that no one of the arms may be dismounted Without dismounting the entire shaft and, in case of any of the intermediate arms several have to be removed. The object of the present invention is to provide a simple and eiicient self-contained mounting for each such rocker arm which provides for a forcefeed and permits the ready demounting of any one of the arms and its Supporting shaft without disturbing any of the other mountings or the common supply line for the lubricant. j

The invention will be described with reference to the embodiment thereof in several practical units shown in the drawings wherein Figure 1 is a view in side elevation of a rocker arm illustrating conventionally its relation to valves to be actuated.

Figure 2 is a view in longitudinal vertical section taken through the mounting shown in Figure 1 and takenon the plane indicated by the line 2-2 of Figure 1 and looking in the direction of the arrows.

Figure 3 is a transverse sectional view taken on the plane indicated by-the line 8 3 of Figure 2 and looking in the direction of the arrows.

Figures 4 and 6 are longitudinal vertical sections of modified forms of mountings embodying the invention.

Figure 5 is a transverse sectional view through the embodiment shown in Figure 4 'tween the proximate ends of the bushings and taken on the plane indicated by the line 5-5 of Figure 4 and looking in the direction of the arrows.

The rocker arm a illustrated conventionally in Figure 1 is adapted to actuate a valve lifter such as. b and be actuated by a lifter rod c in accordance with well known practice. The problem is to mount the arm a in such manner that it may be lubricated through a force-feed and be removed when required without disturbing any of the other rocker arms or their mountings or the supplyl pipe for the lubricant. One suitable embodiment is illustrated in Fig,- ure 2. As shown there the rocker arm a is formed with a circular bearing in which may be inserted spa-ced bushings cl, d', through which passes the supporting tubular shaft e. An annular space l2 left be- (l, d, communicates through an opening e in the shaft e and serves to receive a lubricant which is conveyed thereto under compression through the tubular shaft e and the opening e for lubricating the arm a in its oscillations. The shaft e may be journaled by many different means all permitting its ready dismounting without disturbing the lubricant supply line. For instance, as shown in Figure 2, a simple journal f may receive one end of the shaft and constitute acap therefor this journal being provided with a shank f mounted removably in a suitable 'supporting bracket g and secured therein by means of a nut h. kThe other end of the shaft may be similarly mounted and the supporting journal i' therefor may haver its shank drilled as at i to form a. channel for the lubricantl which may communicate with a channel 7.: formed in the supporting bracket 7c for the shank i2, the last named channel being connected to the oil supply line Z. lA nut m may be threaded onto the lower end of the shank '2 for securing it in the bracket 7u. From the description given it will be evident that the lubricant may be supplied under forcedfeed from the oil pipe Z through the tubu. lar shaft e to the bearing for the arm a. If it is desired to dismount the arm a for any purpose the nuts h and m may be removed and the shanks f. 2, lifted out of their respect-ive supports thereby permitting the removal of the arm and its entire mounting as a unit. This removal Will not disturb the connection of the oil supply line Z nor will it disturb any of the other rocker arms Which may be associated With ,the engine.v When thus removed the mounting may quickly be disassembled by taking off the journals f, i, and slipping the shaft e out of the central bearing for the arm.

The modification in Figure 4 is substantially similar exceptv that the shaft E is supported at one end in a journal block l which is secured detachably in place by means of a stud I2 and bolt M disposed Wholly at one side of the shaft E and forming no part of the lubricant channels as in the embodiment shown in Figurev2.

ln the embodiment shown in Figure 6 the construction is again substantially similar except that the lubricant supply pipe L is disposed in a little different relation to the axis of the shaft E.

The different embodiments shown merely illustrate the latitude in practicing the invention With its attendant advantages and are not to be considered as limiting but merely as illustrative. Changes in relations of vparts Wlill suggest themselves to one skilled inthe art and other arrangements of the oil ducts may be made Without departing from they spirit of the invention.

What li claim'is:

l.. In combination with a rocker arm for valves a tubular shaft on which the arm incenso is mounted and through which a lubricant is supplied under forced-feed to the arm, journals for supportingthe shaft and means for dismounting the shaft With the arm as a unitary structure.

2. ln combination with a rocker arm for valves a self-contained unitary mounting therefor including a hollow shaft on which the arm is mounted, journals in which the ends of the shaft are supported, one of said journals being provided with a duct through Which a lubricant may be led into the bore of the shaft, a supply line for the lubricant permanently connected with Said last named journal and means for securing vthejournals removably.

3. In combination With a rocker arm for valves spaced bushings on which the arm is mounted, through the bushings, journal blocks in Which the ends of the shaft are mounted, said blocks constituting caps to close the shaft, a lubricant supply line communicating with one of said journal blocks, and means for securing the journal blocks detachably in place independent of said lubricant supply line the veleiiients being provided with ducts to lead the lubricant from the lubricant supply line to said bushings.

This specification signed this 4th day of December, A. D. 1922.

KEli'llli-li 'RQ MANVLLE.

a tubular shaft extending. 

